Yes, the door card is the whole leather inside portion of the door that has the door handle and speaker grill. The whole thing just snaps onto the door with clips on the outer perimeter and some screws. When I first got the car the clips were nice and hard plastic, but over time they have become brittle and tend to break more often. Next time you are driving and you hear the sound, press your leg on the door to cover as much as you can. If the noise stopps then its the resonance. Your leg will absorbe the vibrations and stop the door from rattling. If not, then your speaker may be blown and the heavy mid bass of some songs maybe causing distortion. The speakers are made of paper. When I replaced mine the rubber gasket around the speaker that attached the paper cone to the metal basket was crumbling because it was so dried out.